Cold Coffee Brewing

ABSTRACT

A cold coffee brewing device reduces the time required to produce cold brewed coffee. The cold brewer includes a container, preferably transparent, and an elongated brewing material holder suspended from a lid of the container. The brewing material holder is enclosed in a mesh to retain brewing material in the brewing material holder. In one embodiment, the mesh is a fine nylon mesh or a 75 micron opening nylon mesh. The lid includes a mechanism to rotate the brewing material holder. The container is filled with water and the brewing material holder is filled with brewing material. Movement of the brewing material submerged in water substantially reduces the time required for cold brewing.

BACKGROUND OF THE INVENTION

The present invention relates to beverage brewing and in particular to cold coffee brewing.

Some coffee drinkers prefer the flavor provided by cold brewing often referred to as steeping. Such cold brewing is provided by submerging a portion of brewing material in un-heated water for a period of time, for example ten hours, to complete brewing. While the steeping process may provide a desired result, the time required is excessive.

BRIEF SUMMARY OF THE INVENTION

The present invention addresses the above and other needs by providing a cold coffee brewing device which reduces the time required to produce cold brewed coffee. The cold brewer includes a container, preferably transparent, and an elongated brewing material holder suspended from a lid of the container. The brewing material holder is enclosed in a mesh to retain brewing material in the brewing material holder. In one embodiment, the mesh is a fine nylon mesh or a 75 micron opening nylon mesh. The lid includes a mechanism to rotate the brewing material holder. The container is filled with water and the brewing material holder is filled with brewing material. Movement of the brewing material submerged in water substantially reduces the time required for cold brewing.

In accordance with one aspect of the invention, there is provided a cold coffee brewing device including a brewing material holder immersed on water and a drive assembly to rotate the brewing material holder. The brewing material holder preferably oscillates at between 30 and 90 cycles per minutes and between 90 degrees and 270 degrees of rotation. Motion of the brewing material in the water reduced cold brewing time from as much as ten hours to as little as one hour.

In accordance with another aspect of the invention, there is provided a method for cold coffee brewing including pouring brewing material into a brewing material holder of a cold coffee brewer, positioning a drive assembly on a container lid of the cold coffee brewer, the vertical bars engaging the upward pointing triangular teeth to align the vertical bars with the upward pointing triangular teeth and mechanically rotationally couple the drive assembly to the brewing material holder, operating the drive assembly to oscillate the brewing material holder in an oscillating manner between 90 degrees and 270 degrees of rotation at a frequency between 30 and 90 cycles per minutes, waiting for the cold brewed coffee to be brewed, removing the drive assembly, and positioning a pouring lid on the container lid.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

The above and other aspects, features and advantages of the present invention will be more apparent from the following more particular description thereof, presented in conjunction with the following drawings wherein:

FIG. 1A shows a side view of a cold coffee brewing device according to the present invention.

FIG. 1B shows a top and side view of the cold coffee brewing device according to the present invention.

FIG. 1C shows a bottom and side view of the cold coffee brewing device according to the present invention.

FIG. 2 shows a bottom and side view of a liquid container according to the present invention.

FIG. 3A shows a side view of the liquid container according to the present invention.

FIG. 3B shows a top view of the liquid container according to the present invention.

FIG. 3C shows a bottom view of the liquid container according to the present invention.

FIG. 4 shows a side view of the cold coffee brewing device according to the present invention with a lid cover removed.

FIG. 5A shows a top and side view of a brewing material holder of the cold coffee brewing device according to the present invention.

FIG. 5B shows a bottom and side view of the brewing material holder of the cold coffee brewing device according to the present invention.

FIG. 6A shows a side view of the brewing material holder of the cold coffee brewing device according to the present invention.

FIG. 6B shows a second side view of the brewing material holder of the cold coffee brewing device according to the present invention.

FIG. 6C shows a top view of the brewing material holder of the cold coffee brewing device according to the present invention.

FIG. 6D shows a bottom view of the brewing material holder of the cold coffee brewing device according to the present invention.

FIG. 7 shows mesh material used to enclose the brewing material holder according to the present invention.

FIG. 8A shows a top and side view of a drive assembly according to the present invention.

FIG. 8B shows a bottom and front view of the drive assembly according to the present invention.

FIG. 9A shows a top and side view of a container cap according to the present invention.

FIG. 9B shows a bottom and side view of the container cap according to the present invention.

FIG. 9C shows a top plan view of the container cap according to the present invention.

FIG. 10 shows an exploded view of the container, container cap, brewing material holder, and coupler of the cold coffee brewing device according to the present invention.

FIG. 11A shows a top view of a pouring lid of the cold coffee brewing device according to the present invention.

FIG. 11B shows a bottom view of the pouring lid of the cold coffee brewing device according to the present invention.

Corresponding reference characters indicate corresponding components throughout the several views of the drawings.

DETAILED DESCRIPTION OF THE INVENTION

The following description is of the best mode presently contemplated for carrying out the invention. This description is not to be taken in a limiting sense, but is made merely for the purpose of describing one or more preferred embodiments of the invention. The scope of the invention should be determined with reference to the claims.

Where the terms “about” or “generally” are associated with an element of the invention, it is intended to describe a feature's appearance to the human eye or human perception, and not a precise measurement.

A side view of a cold coffee brewing device 10 according to the present invention is shown in FIG. 1A, a top and side view of the cold coffee brewing device 10 is shown in FIG. 1B, and a bottom and side view of the cold coffee brewing device 10 is shown in FIG. 1C. The cold coffee brewing device 10 includes a container 12 for containing water during brewing, and an open mouth for attachment of a container cap 50 of a top 20. The container 12 is preferably transparent to allow viewing the water in the container 12 as the water darkens while brewing progresses. A brewing material holder 30 is suspended from the top 20 and the brewing material holder 30 is covered by a mesh material 30 a (see FIG. 7). A handle 18 is attached to the top 20.

A bottom and side view of the liquid container 12 is shown in FIG. 2, a side view of the liquid container 12 is shown in FIG. 3A, a top view of the liquid container 12 is shown in FIG. 3B and , a bottom view of the liquid container 12 is shown in FIG. 3C. In one embodiment the liquid container 12 is made of glass, in another embodiment from plastic. The container 12 is preferably transparent to allow viewing the water in the container 12 as the water darkens while brewing progresses, but may be an opaque material without preventing function of the cold coffee brewing device 10. The container 12 includes closed sides and bottom and an open mouth 14 for attachment of the container cap 50, and is preferably generally cylindrical in shape. The open top 14 includes threads 14 for attaching the top 20. Those skilled in the art will recognize that other structure for attaching a lid to a bottle may be used and are intended to come within the scope of the present invention.

A side view of the cold coffee brewing device 10 with the lid cover 22 removed is shown on FIG. 4. A drive assembly 40 is contained in the top 20 and rotates the brewing material holder 30 during cold brewing.

A top and side view of a brewing material holder 30 of the cold coffee brewing device 10 is shown in FIG. 5A and a bottom and side view of the brewing material holder 30 is shown in FIG. 5B. The brewing material holder 30 includes a skeleton 39 (see FIG. 6A) comprising vertical members 32 and circular members 36. Blades 34 reaching into the interior of the skeleton 39 to urge brewing material to rotate with the brewing material holder 30. A bottom cap 33 is attached to the bottom of the skeleton 39, preferably threadedly attached. Fins 31 on the bottom of the bottom cap 33 reach down and provide mixing to the water in the container 12 as brewing progresses. The bottom cap 33 preferably provides a bottom plate 35 preventing escape of the brewing material from the brewing material holder 30. A holder handle 38 is pivotally attached at the top of the brewing material holder 30 by pivots 38a facilitates lifting of the brewing material hold 30 from the container 12.

A side view of the brewing material holder 30 is shown in FIG. 6A, a second side view of the brewing material holder 30 is shown in FIG. 6B, a top view of the brewing material holder 30 is shown in FIG. 6C, and a bottom view of the brewing material holder 30 is shown in FIG. 6D. Triangular teeth 37 point up from the brewing material holder 30 and engage vertical bars 48 (see FIG. 8B) of the drive assembly 40 to rotationally couple the brewing material holder 30 to the drive assembly 40.

A mesh covering 30 a of the brewing material holder 30 is shown in FIG. 7. The mesh covering 30 a is attached around the skeleton of the brewing material holder 30 preventing escape of brewing material 30 b from the brewing material holder 30. Examples of suitable mesh materials are fine nylon mesh, 75 micron opening nylon mesh, metal mesh material, paper mesh material (e.g., filter paper). Those skilled in the art will recognize that other mesh material may be used, and a brewing material holder enclosed in such other mesh material are intended to come within the scope of the present invention.

A top and side view of a drive assembly 40 is shown in FIG. 8 and a bottom and front view of the drive assembly 40 is shown in FIG. 8B. The drive assembly 40 resides on top of the container cap 50. Lips 47 of the drive assembly 40 straddle a handle support 52 of the container cap 50 (see FIG. 9A) to rotationally fix the drive assembly 40. Rotation is preferably provided by a electric motor 42 through reduction gears 44 and 46. The drive assembly 40 includes a drive coupler 47 rotationally coupling the gear 46 to vertical bars 48 pointing down to engage the triangular teeth 37 (see FIG. 6A, 6B) of the brewing material holder 30 to rotationally couple the brewing material holder 30 to the drive assembly 40. The reduction gears 44 and 46 reduce the speed rotation of the brewing material holder 30. The rotational motion is preferably an oscillation of between 90 degrees and 270 degrees and preferably about 120 degrees, at a cycle of between 30 cycles per minute and 90 cycles per minute, and preferably about 60 cycles per minute. While preferred rates and rotation angles are provided here, those skilled in the art will recognize other combinations of rates and rotation angles useful for cold brewing, and a cold brewing device according to the present invention operating at other rates and rotation angles is intended to come within the scope of the present invention, and that the reduction gears may be replaced by a belt drive, and that present invention replacing the gears with a belt drive is intended to come within the scope of the present invention.

A top and side view of a container cap 50 of the cold coffee brewing device 10 is shown in FIG. 9A, a bottom and side view of the container cap 50 is shown in FIG. 9B, a top plan view of the container cap 50 is shown in FIG. 9C, and an exploded view of the container 12, container cap 50, brewing material holder 30, and coupler 47 of the cold coffee brewing device 10 is shown in FIG. 10. The container cap 50 engages the container during brewing and pouring. The brewing material holder 30 sides down through the container cap 50 into the container 12 and is supported by the container cap 50. The coupler 47 engages the brewing material holder 30 when the drive assembly 40 is placed onto the container cap 50 to rotate the brewing material holder 30 during brewing. A spout 54 facilitates pouring brewed drink from the cold coffee brewing device 10.

A top view of a pouring lid 60 of the cold coffee brewing device 10 is shown in FIG. 11A and a bottom view of the pouring lid 60 is shown in FIG. 11B. The pouring lid 60 replaces the drive assembly 40 after brewing brewed beverage. A lid handle 62 allows a user to remove the pouring lid 60. The pouring lid 60 can be rotated to align and separate a spout guard 66 from the spout 54 (see FIGS. 9A-9C).

While the invention herein disclosed has been described by means of specific embodiments and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims. 

I claim:
 1. A cold coffee brewer, comprising: a liquid container having an open top; a container lid attachable to the open top; a rotatable brewing material holder suspended from the container lid; a mesh material enclosing an interior of the brewing material holder; and a drive assembly positionable over the container lid and connected to the brewing material holder to rotate the brewing material holder, wherein the cold coffee brewer is configured to receive a portion of coffee brewing material and operate to produce cold brewed coffee.
 2. The cold coffee brewer of claim 1, wherein the drive assembly includes an electric motor.
 3. The cold coffee brewer of claim 2, wherein the drive assembly includes reduction gears to couple the electric motor to the brewing material holder.
 4. The cold coffee brewer of claim 2, wherein the drive assembly includes a belt drive to couple the electric motor to the brewing material holder, the belt drive reducing the speed of the brewing material holder with respect to the electric motor.
 5. The cold coffee brewer of claim 2, wherein the drive assembly includes a coupler including angularly spaced apart vertical bars and the beverage material holder includes upward pointing teeth which align and engage the vertical bars to rotationally couple the drive assembly to the beverage material holder.
 6. The cold coffee brewer of claim 5, wherein the upward pointing teeth are generally triangular in shape.
 7. The cold coffee brewer of claim 2, wherein the motor oscillates the brewing material holder between 90 degrees and 270 degrees of rotation at a frequency between 30 and 90 cycles per minutes.
 8. The cold coffee brewer of claim 7, wherein the motor oscillates the brewing material holder about 120 degrees of rotation.
 9. The cold coffee brewer of claim 2, wherein the motor oscillates the brewing material holder at a frequency of about 60 cycles per minute.
 10. The cold coffee brewer of claim 1, wherein the container is made from a transparent material allowing viewing of the brewed coffee during steeping.
 11. The cold coffee brewer of claim 1, wherein the mesh is selected from the group consisting of a fine nylon mesh, a 75 micron opening nylon mesh, a metal mesh, a paper mesh material, and filter paper.
 12. The cold coffee brewer of claim 11, wherein the mesh is a fine nylon mesh material.
 13. The cold coffee brewer of claim 11, wherein the mesh is a 75 micron opening nylon mesh.
 14. The cold coffee brewer of claim 1, wherein the beverage material holder includes a skeleton comprising vertical members and circular members.
 15. The cold coffee brewer of claim 14, wherein blades project radially into an interior of the beverage material holder.
 16. A cold coffee brewer, comprising: a liquid container made of a transparent material and having an open top; a container lid attachable to the open top; a rotatable brewing material holder suspended from the container lid; a nylon mesh material enclosing an interior of the brewing material holder; and a drive assembly positionable over the container lid and connected to the brewing material holder to rotate the brewing material holder in an oscillating manner between 90 degrees and 270 degrees of rotation at a frequency between 30 and 90 cycles per minutes; and a coupler coupling the drive assembly to the brewing material holder, the coupler including angularly spaced apart vertical bars and the beverage material holder including upward pointing teeth which align and engage the vertical bars of the coupler to rotationally couple the drive assembly to the beverage material holder, wherein the cold coffee brewer is configured to receive a portion of coffee brewing material and operate to produce cold brewed coffee.
 17. A method for making cold coffee brewer, comprising: pouring brewing material into a brewing material holder of a cold coffee brewer, the cold coffee brewer comprising: a liquid container made of a transparent material and having an open top; a container lid attachable to the open top; a rotatable brewing material holder suspended from the container lid and comprising: a skeleton comprising vertical members and circular members; and blades projecting radially into an interior of the beverage material holder; a nylon mesh material enclosing the interior of the brewing material holder; and a drive assembly positionable over the container lid and connected to the brewing material holder to rotate the brewing material holder in an oscillating manner between 90 degrees and 270 degrees of rotation at a frequency between 30 and 90 cycles per minutes; and a coupler coupling the drive assembly to the brewing material holder, the coupler including angularly spaced apart vertical bars and the beverage material holder including upward pointing triangular teeth which align and engage the vertical bars of the coupler to rotationally couple the drive assembly to the beverage material holder; positioning the drive assembly on the container lid, the vertical bars engaging the upward pointing triangular teeth to align the vertical bars with the upward pointing triangular teeth and mechanically rotationally couple the drive assembly to the brewing material holder; operating the drive assembly to oscillate the brewing material holder in an oscillating manner between 90 degrees and 270 degrees of rotation at a frequency between 30 and 90 cycles per minutes; waiting for the cold brewed coffee to be brewed; removing the drive assembly; and positioning a pouring lid on the container lid. 